| <!-- |
| Copyright (c) 2019 The Khronos Group Inc. |
| Use of this source code is governed by an MIT-style license that can be |
| found in the LICENSE.txt file. |
| --> |
| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WebGL Disabled Vertex Attrib Update Test</title> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../js/js-test-pre.js"></script> |
| <script src="../../js/webgl-test-utils.js"> </script> |
| </head> |
| <body> |
| <canvas id="example" width="50" height="50"> |
| </canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script id="vshader" type="x-shader/x-vertex"> |
| attribute vec4 a_position; |
| attribute float a_actualValue; |
| uniform float u_expectedValue; |
| varying float v_result; |
| void main() { |
| gl_Position = a_position; |
| v_result = a_actualValue == u_expectedValue ? 1.0 : 0.0; |
| } |
| </script> |
| |
| <script id="fshader" type="x-shader/x-fragment"> |
| precision mediump float; |
| varying float v_result; |
| void main() { |
| gl_FragColor = v_result > 0.0 ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0); |
| } |
| </script> |
| |
| <script> |
| // Tests that repeatedly updating a disabled vertex attribute works as expected. |
| // This covers an ANGLE bug where dirty bits for current values were ignoring repeated updates. |
| // Based on ANGLE test (VertexAttributeTest, DisabledAttribUpdates) from https://github.com/google/angle/blob/f7f0b8c3ab21c52cc2915048959361cf628d95f0/src/tests/gl_tests/VertexAttributeTest.cpp |
| "use strict"; |
| var wtu = WebGLTestUtils; |
| description(); |
| |
| var gl = wtu.create3DContext("example"); |
| |
| var program = wtu.setupProgram(gl, ['vshader', 'fshader']); |
| gl.useProgram(program); |
| |
| var positionLocation = gl.getAttribLocation(program, "a_position"); |
| var attribLoc = gl.getAttribLocation(program, "a_actualValue"); |
| gl.vertexAttribPointer(attribLoc, 1, gl.FLOAT, gl.FALSE, 0, 0); |
| |
| var uniLoc = gl.getUniformLocation(program, "u_expectedValue"); |
| |
| var gridRes = 1; |
| wtu.setupIndexedQuad(gl, gridRes, positionLocation); |
| |
| var testValues = [1, 2, 3, 4]; |
| for (var i = 0; i < testValues.length; ++i) { |
| var testValue = testValues[i]; |
| gl.uniform1f(uniLoc, testValue); |
| gl.vertexAttrib1f(attribLoc, testValue); |
| wtu.clearAndDrawIndexedQuad(gl, gridRes); |
| wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green"); |
| } |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors"); |
| |
| var successfullyParsed = true; |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| |
| </body> |
| </html> |
| |